Portable oven



(No Model.)

G. W. WALKER.

PORTABLE OVEN.

No. 483,501. Patented Aug.5,1890.

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UNrrnD STATESv PATENT OFFICE.

GEORGE WV. WALKER, OF MALDEN, MASSACHUSETTS.

PORTABLE OVEN.

SPECIFICATION forming part of Letters Patent No. 433,501, dated August5, 1890; Application tiled FehruarylO, 1890. Serial No. 339,810. (Nomodel.)

To all whom it may concern:

Be it known that l, GEORGE W. WALKER, of Malden, county of Middlesex,State of Massachusetts, have invented an Improvement in Portable Ovens,of which the following description,in connection with the accompanyingdrawings, is a specification, like letters on the drawings representing'like parts. This invention relates to cooking apparatus, and is hereinshown as embodied in a portable oven provided, preferably, with twocompartments, one or both of which have preferably perforated or openbottoms, a damper registering with the said openings, and means toseparate the said damper from the perforated bottom when the said damperis moved to uncover the said openings.

The portable oven herein shown consists of an outer casing, preferablymade of double walls having an intervening air-space and divided by acentral wall or partition extending from the top toward the bottom ofthe casing to form two compartments7 one or both of which may beprovided with a bottom having one 01 more openings and forming below ita chamber, in which is located the stove or other heater. The openingsin the bottom are normally closed by a sliding damper having one or moreopenings to register with the openings in the bottom of the compartment,and provided with means (herein shown as rollers secured to the damper,and movable on inclined guides or ways) to separate the damper from thebottom plate when the said damper is moved to uncover the said opening.Each compartment is preferably pro vided with a door having a projectioncream,

preferably made adjustable, as will be described, whereby when in oneposition it may act on the sliding damper and move the same inward touncover the openings in the bottom of the compartment to permit of thepassage of heat into said compartment and when in another position itwill not act upon the said damper, and the latter will remain closedwhen the door is shut. The sliding damper of each compartment isautomatically returned to its normal position by the rollers moving downon the inclined ways or guides located below the bottom of thecompartment.

The particular features of my invention will be pointed out in theclaims at the end of this specification.

Figure l is a front elevation of a portable oven embodying my invention,the door of one of the compartments being shown open. Fig. 2 is ahorizontal section of the oven shown in Fig. l on line 5c, the open doorbeing shown in different position from that shown in Fig. l; Fig. 3, atransverse sectional detail on the irregular line fr', Fig. 2; Fig. et,a sectional detail to more clearly show the sliding damper, the rollerscarried thereby, and the inclines upon which the rollers move; and Fig.5, a sectional modication to be referred to.

The casing or oven of sheet metal or other suitable material, provided,as herein shown, with double walls a a', secured together in anysuitable manner to leave an intervening air-space a2, which, if desired,may be filled with magnesia or other non-heat-conducting material, isherein shown as divided into two compartments a* a5 by a central wallc6, eX- tended from the top of the inner wall a toward the bottom of thecasing, preferably nearly two-thirds the height of the oven, and may besubstantially such as shown and described in another application, SerialNo. 316,20l, tiled by me July l, 1889. The compartments a4 a5 may bothbe provided with bottom plates or walls c7 as, preferably made removableand supported by lugs 20, secured to the central wall and to the innerwall a', and forming below the compartments a chamber @12in whichis'located a stove @1 3 or other heater-such, for instance, as agas-burner.

Each bottom plate cT as is provided, as herein shown,with a number ofslots or openings b, and the said bottom plates have co-operating withthem sliding dampers b b2, provided with openings b3 adapted to registerwith the openings b to permit heat from the heater cl3 to pass into thesaid compartments.

The sliding dampers b b2 are provided, as herein shown, with dependinglugs or ears b4, one at each end on its opposite. sides, to which aresecured rollers 0r wheels b5, resting upon inclined ways or guides bfi,secured to or forming part of the bottom of the compartment.

The sliding dampers h b2 are provided at their front ends near thecentral wall, as here- IOO in shown, with an upright portion or lug d,which is preferably adapted to be engaged by a cam or projection d.(Herein shown as forming part of a lever cl2, pivoted to the inner sideof the doors d3 d4.) The lever d2, as herein shown, is pivoted at (Z5,substantially near the center of each door near its bottom, and isadapted to be moved toward the outer or inner side of the said door,according to whether or not it is desired that the cam d should act uponthe projection d on the sliding damper. The lever d2 on each door ismaintained in its operative orinoperative position by catches orretaining devices. (Herein shown as bent j lugs d6 dl, secured to orforming part of the door.)

The heater C413 is provided, as herein shown, with two stove-pipes e e',which are extended, as herein shown, up through the compartments a4 a5,and are connected to a hood c2, provided with suitable dampers c3 e4,substantially as in the application referred to, the said hood beingconnected to the compartments a4 a5 by the pipes e5 e6.

The chamber al@ is provided with the usual door e8 and dampers e9 ew, asin the application referred to.

In the operation of my improved portable oven each lever cl2 may beturned to engage with its catch or retaining device d6, as shown in Fig.2, so that when both doors d3 d4 are closed the projection or cam d willstrike the upright d on the sliding damper of its compartment and movethe said damper backward. As each damper is moved backward the rollersb5 ride up the inclined paths or guideways until the rear end of thedampers are brought against a suitable stop, which in the presentinstance is shown as the rear inner wall a', the openings b3 of thedamper at such time registering with the openings b on the bottom of thecompartment. Vhen both dampers are moved back to uncover the openings b,as described, both compartments a4 a5 may be used for cooking purposes;but if it is desired to use only one of the said compartments forcooking purposes and the other as a hot-closet-as, for instance, if itis desired toemploy the compartment d for cooking purposes and thecompartment d5 as a hotcloset--the lever cl2 on the door d4 will beengaged with its catch d6, and the lever d2 on the door da will beturned on its pivot and engaged with the catch C17 on the door (Z3, sothat when the said door d3 is closed the sliding damper b2 will not beacted upon, but will remain in its normal position, (shown in Fig. 2,)and the openings b in the bottom plate as will remain covered, while thesliding damper b of the compartment a4 is moved backward when the doord4 is closed to permit the heat from the chamber d10 to pass directlyinto the said compartment. Vhen the door d4 ofthe compartment a4 isagain opened, the rollers b5 travel down the inclined guideways, andthus close the openings in the bottom plate of the said compartment.

limit myself to any particular number of openings in the bottom plate,as one or moremay be used. So, also, the sliding damper, provided with aprojection adapted to be engaged by a cam or projection, may be used onan' oven having but one compartment, and therefore I do not desire tolimit this feature of my invention to an oven having but twocompartments, as herein shown.

I have herein shown my invention as embodied in a portable oven; but Ido not desire to limit myself to this form of oven, as it is evident thesaid damper may be employed in a single or multiple oven made of brick,iron, or other usual material.

I have herein shown the damper as restored to its normal or closedposition by means of inclined ways; but I do not desire to limit myselfto the specific device shown, as other equivalent means may beemployed-as, for instance, the damper might be actuated by a spring.

I have herein shown the bottom plate provided with openings; but, ifdesired, the said bottom plate may be made solid and the centraldividing-wall a6 provided with one or more openings, which arecontrolled by a damper.

I have described the lugs supporting the p rollers as secured to themovable damper; but

I do not desire to limit myself in this respect, as the said lugs androllers may be attached to the bottomplate and the inclined guide- `Wayssecured to the movable damper, substantially as shown in Fig. 5.

I claiml. In an oven,"the combination, with the oven-Casin g providedwith a door and a plate or wall provided with one or more openings, andforming within the said oven two compartments, of a movable damperregistering with said opening, and means to automatically move saiddamper to close said opening when the oven-door is opened, substantiallyas described.

2. In au oven, the combination, with the oven-casing provided Witha doorand aplate or wall provided with one or more openings, and formingwithin the said oven two compartments, and guideways located below thebottom plate or wall, of a movable damper registering with said openingand provided with lugs or ears having rollers to travel on saidguideways, and a cam or projection adapted to be operated by the closingof the door to uncover the opening inthe bottom plate, substantially asdescribed.

3. In an Oven, the combination, With the oven-casing provided with adoor and a plate or wall provided with one or more openings, and formingWithin the said oven two compartments, of a movable damper registeringwith said opening and means to separate the movable damper from theplate or wall to IOO IIO

avoid friction when the damper is moved, substantially as described.

4. In aportable oven, the combination, with an outer Wall or casing, ofa central dividing- Wall secured to the front and'rear Wall ot' the saidcasing and extended fromihe top toward the bottom of the casing to formindependent compartments on opposite sides thereof, a chamber am belowit, a bottom plate or wall for one or both of said compartments providedwith one or more openings, a sliding damper to close said opening, and aheater located in the chamber al", and an exit flue or passage for saidheater, passing through, but not com municating with, the compartments,a hood for said iiue, and connections between the hood and thecompartments, substantially as described.

5. In a portable oven, the combination, with an outer Wall or casing, ofa door for said compartment, a chamber am, located below the saidcompartment, a heater in said chamber, a bottom plate fortheoompartrnentprovided with one or more openings, a damper for each bottom plateprovided with a lug or projection, a cam or projection adjustable on thedoor adapted to be brought into position to engage the lug or projectionon the damper when the door is closed, inclined guides Aor Ways securedto the bottom plate, and rollers carried by the sliding damper andmovable on the said guides or Ways to thereby raise said damper from anduncover the openings in said bottom plate, substantially as described.

6. In a portable oven, the combination, with a Wall or casing, of' abottom plate forming an' upper compartment and a chamber below it, oneor more openings in said bottom plate, a damper to close said openinghaving a lug or projection, a door for said oven, a cam or projection onsaid door adapted to be brought into position to engage the lug orprojection on the damper when the door is closed, and means to restorethe damper to its normal position When the door is open, substantiallyas described.

In testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE W. WALKER.

Witnesses JAs. H. CHURCHILL, EMMAJ. BENNETT.

